An outdoor central air conditioning unit mounted on a concrete pad beside a blue-sided house at sunset.

AC Maintenance in Moses Lake, WA

Air conditioners here run from July through August, so June is the time for a tune-up. Tell us about your system, and a licensed contractor who covers Grant County will get in touch.

Tell us about the job

It takes about a minute.

Step 1 of 3: Equipment
Overhead view of a gray residential air conditioning condenser unit mounted on a concrete pad beside a house with asphalt shingle roofing.

Two months of hard work every summer

Your air conditioner in Moses Lake only works July and August, but those two months lean on it hard. Afternoons averaging 85°F mean the compressor runs long stretches with little break between them.

A short season doesn't mean less wear. It means the wear is packed into a few weeks instead of spread over the year. A tune-up before that stretch checks the refrigerant charge and the condenser coil, since those are what decide whether the system can keep up once the heat sets in. Grant County has also logged 30 damaging wind events over the past ten years, and wind like that can blow debris into an outdoor unit or leave the coil running dirty. A look at the unit beforehand catches that kind of problem while it's still small.

2 months
July through August, your air conditioner is on duty
85°F
the average summer afternoon it cools against
1 hail events
in ten years, and hail bends the fins on outdoor coils
30 wind events
in ten years, and wind drives debris into outdoor units
Isometric cutaway illustration of a single-story house showing interior rooms, ductwork and an air handler in the attic space, and an outdoor condenser unit connected by lines at the exterior wall.
Your air conditioner works hardest from July through August.

NOAA nClimDiv, 1991–2020 normals

Aerial view of a gray outdoor air conditioning condenser unit mounted on a concrete pad next to a house with vinyl siding.

Book your AC tune-up in June, before homes here start needing cooling in July.

  1. Jan
  2. Feb
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  5. May
  6. Jun
  7. Jul
  8. Aug
  9. Sep
  10. Oct
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  12. Dec

A tune-up checks the refrigerant charge, cleans the coils, tests the capacitor and tightens the electrical connections.

Washington requires contractors to register with the state.

That registration puts the business on file with the Department of Labor and Industries and confirms it carries the bond and insurance the state requires. It is not a trade exam, and Washington does not test or license contractors the way some states do. What you're getting is a record that the business is who it says it is, not proof of how well they work on an air conditioner.

For maintenance work, the part that matters most is the refrigerant. Any technician who opens that side of your system, to check the charge or recover refrigerant, has to hold EPA Section 608 certification. That's a federal requirement, the same in every state, and it exists because refrigerant has to be handled and disposed of correctly. It's the one credential tied to this specific job that you can count on here.

Source: Washington State Legislature

What does AC maintenance include?
A technician checks refrigerant pressure, cleans the condenser coil, and tests the capacitor and contactor in the outdoor unit. Inside, they check the evaporator coil and the condensate drain, since a clogged drain line is one of the most common reasons an AC stops cooling. They also check the thermostat and confirm the system is cycling on and off the way it should. Anyone touching the refrigerant side of the system has to hold EPA 608 certification, so this part of the work is not optional or something a homeowner can do.
How often does an air conditioner need maintenance?
Once a year, before the weather turns hot. Here that means getting it done before July, since cooling season only runs through July and August. A yearly check catches a weak capacitor or a low refrigerant charge before a 85°F afternoon forces the system to work with a problem it could otherwise handle.
Is AC maintenance worth it?
Yes, mainly because it catches small problems while they are still cheap to fix. A dirty coil or a failing capacitor makes the system work harder without cooling any better, and that strain is what leads to a breakdown on the hottest day of the year. With only two months of real cooling demand here, a system that is not maintained often does not show a problem until it is needed most.